/usr/include/libzfs/sys/sha2.h is in libzfslinux-dev 0.7.5-1ubuntu15.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright 2013 Saso Kiselkov. All rights reserved. */
#ifndef _SYS_SHA2_H
#define _SYS_SHA2_H
#ifdef _KERNEL
#include <sys/types.h> /* for uint_* */
#else
#include <stdint.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
#define SHA2_HMAC_MIN_KEY_LEN 1 /* SHA2-HMAC min key length in bytes */
#define SHA2_HMAC_MAX_KEY_LEN INT_MAX /* SHA2-HMAC max key length in bytes */
#define SHA256_DIGEST_LENGTH 32 /* SHA256 digest length in bytes */
#define SHA384_DIGEST_LENGTH 48 /* SHA384 digest length in bytes */
#define SHA512_DIGEST_LENGTH 64 /* SHA512 digest length in bytes */
/* Truncated versions of SHA-512 according to FIPS-180-4, section 5.3.6 */
#define SHA512_224_DIGEST_LENGTH 28 /* SHA512/224 digest length */
#define SHA512_256_DIGEST_LENGTH 32 /* SHA512/256 digest length */
#define SHA256_HMAC_BLOCK_SIZE 64 /* SHA256-HMAC block size */
#define SHA512_HMAC_BLOCK_SIZE 128 /* SHA512-HMAC block size */
#define SHA256 0
#define SHA256_HMAC 1
#define SHA256_HMAC_GEN 2
#define SHA384 3
#define SHA384_HMAC 4
#define SHA384_HMAC_GEN 5
#define SHA512 6
#define SHA512_HMAC 7
#define SHA512_HMAC_GEN 8
#define SHA512_224 9
#define SHA512_256 10
/*
* SHA2 context.
* The contents of this structure are a private interface between the
* Init/Update/Final calls of the functions defined below.
* Callers must never attempt to read or write any of the fields
* in this structure directly.
*/
typedef struct {
uint32_t algotype; /* Algorithm Type */
/* state (ABCDEFGH) */
union {
uint32_t s32[8]; /* for SHA256 */
uint64_t s64[8]; /* for SHA384/512 */
} state;
/* number of bits */
union {
uint32_t c32[2]; /* for SHA256 , modulo 2^64 */
uint64_t c64[2]; /* for SHA384/512, modulo 2^128 */
} count;
union {
uint8_t buf8[128]; /* undigested input */
uint32_t buf32[32]; /* realigned input */
uint64_t buf64[16]; /* realigned input */
} buf_un;
} SHA2_CTX;
typedef SHA2_CTX SHA256_CTX;
typedef SHA2_CTX SHA384_CTX;
typedef SHA2_CTX SHA512_CTX;
extern void SHA2Init(uint64_t mech, SHA2_CTX *);
extern void SHA2Update(SHA2_CTX *, const void *, size_t);
extern void SHA2Final(void *, SHA2_CTX *);
extern void SHA256Init(SHA256_CTX *);
extern void SHA256Update(SHA256_CTX *, const void *, size_t);
extern void SHA256Final(void *, SHA256_CTX *);
extern void SHA384Init(SHA384_CTX *);
extern void SHA384Update(SHA384_CTX *, const void *, size_t);
extern void SHA384Final(void *, SHA384_CTX *);
extern void SHA512Init(SHA512_CTX *);
extern void SHA512Update(SHA512_CTX *, const void *, size_t);
extern void SHA512Final(void *, SHA512_CTX *);
#ifdef _SHA2_IMPL
/*
* The following types/functions are all private to the implementation
* of the SHA2 functions and must not be used by consumers of the interface
*/
/*
* List of support mechanisms in this module.
*
* It is important to note that in the module, division or modulus calculations
* are used on the enumerated type to determine which mechanism is being used;
* therefore, changing the order or additional mechanisms should be done
* carefully
*/
typedef enum sha2_mech_type {
SHA256_MECH_INFO_TYPE, /* SUN_CKM_SHA256 */
SHA256_HMAC_MECH_INFO_TYPE, /* SUN_CKM_SHA256_HMAC */
SHA256_HMAC_GEN_MECH_INFO_TYPE, /* SUN_CKM_SHA256_HMAC_GENERAL */
SHA384_MECH_INFO_TYPE, /* SUN_CKM_SHA384 */
SHA384_HMAC_MECH_INFO_TYPE, /* SUN_CKM_SHA384_HMAC */
SHA384_HMAC_GEN_MECH_INFO_TYPE, /* SUN_CKM_SHA384_HMAC_GENERAL */
SHA512_MECH_INFO_TYPE, /* SUN_CKM_SHA512 */
SHA512_HMAC_MECH_INFO_TYPE, /* SUN_CKM_SHA512_HMAC */
SHA512_HMAC_GEN_MECH_INFO_TYPE, /* SUN_CKM_SHA512_HMAC_GENERAL */
SHA512_224_MECH_INFO_TYPE, /* SUN_CKM_SHA512_224 */
SHA512_256_MECH_INFO_TYPE /* SUN_CKM_SHA512_256 */
} sha2_mech_type_t;
#endif /* _SHA2_IMPL */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_SHA2_H */
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